Stuck with a turtle, Karrakh, and Magic Valley

[clinek]

what you need to do is approach the orc from the right side of the path and you must wait a little bit after the whole thing before you move. You will notice that immediately after this whole scene takes place, the movement arrow will be red for a few seconds afterwards. When the arrow returns to its normal color, you can then move. If you move before then, you will be thrown into the trees or mountains.